Haaland started as he made his debut in the 3-1 defeat at the King Power Stadium, where he had a goal disallowed and sent a golden opportunity over the bar with City chasing the game late on.
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The boss admitted he was not worried by that miss and remains certain that Haaland will prove his credentials this season.
“He is strong,” said Guardiola at his post-match press conference.
“He missed it and another time he will put it in the net. It happened - it’s football. He had another goal disallowed because the ball was out of the line.
“He has this talent and he will do it. I am not concerned or worried about that.
“I would be happy if he scored and we win but we have a long season ahead of us. It is so intense.
“He is going to help us, I am pretty sure about that.”